<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>
        <div id="app">
            //直接使用计算属性
            <h1>{{fullName}}</h1>
        </div>
        <script src="../js/vue.js"></script>
        <script>
            const app = new Vue({
                el: '#app',
                data: {
                    firstName: 'lebro',
                    lastName: 'lise'
                },
                //计算属性
                computed: {
                    fullName: function() {
                        return this.firstName + ' ' + this.lastName
                    }
                },
            })
        </script>
    </body>
</html>